n: 40 m: 458 packed: 13 density: 0 nodes: 0 solveTime: 12770 buildTime: 120 solved: true
{0,21,29}
{1,9,19}
{2,32,33}
{3,5,8}
{4,22,24}
{6,31,35}
{7,14,26}
{10,12,20}
{11,15,30}
{13,37,39}
{16,34,38}
{17,27,36}
{18,23,25}